Paper guide apparatus for use in an image forming apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorAkira Sago
Life of this patent
Estimating the term…
Abstract
Printed paper is peeled off from an ink sheet at a rear sheet guide roller to be initially fed along a tangential line on a platen roller. When the leading edge of the paper reaches a projecting portion on one of two guide plates, the paper is forcibly bent or redirected toward the other guide plate beyond or through the tangential line, the paper being formed in a shape generally resembling the letter S along a clearance between the projecting portion and the other guide plate. The paper carried in this shape has an inherent stiffness and therefore does not generate vibration due to shaking when peeled off from the ink sheet at the rear sheet guide roller. Consequently, the paper does not beat the guide plates and generates no noise.
Claims12
A paper guide apparatus comprising:
- printing means for printing paper with an ink sheet, said paper including a leading edge;
- a roller abutting against said printing means;
- a pair of opposed guide plates for guiding said paper downstream from said printing means and said roller;
- a first surface provided on one of the pair of opposed guide plates and a second surface provided on the other one of said pair of opposed guide plates;
- and
- a device for imparting stiffness to the paper including a projecting portion provided on the first surface to forcibly redirect said leading edge of said paper approaching said first surface through a tangential line that is tangential at a point of contact of the printing means with said roller to the second surface such that the leading edge contacts the second surface provided on the other one of said pair of opposed guide plates.
A paper guide apparatus, comprising:
- printing means for printing paper with an ink sheet;
- a roller abutting against said printing means;
- separating means for separating the printed paper from said ink sheet;
- a pair of opposed guide plates for guiding said paper downstream from said printing means and said roller;
- and
- guiding means provided on a surface of said pair of guide plates, said guiding means defining an angle of greater than zero as measured between a line along the feed direction of a leading edge of said paper approaching said surface and a straight line connecting the roller and said separating means,
- wherein said guiding means comprises a pair of downstream guide plates arranged on upper and lower sides of said paper, a surface of one of the pair of guide plates that is arranged nearest said roller relative to a tangential line that is tangential at a point of contact of the printing means with said roller being formed with a device for imparting stiffness to the paper including a projecting portion for forcibly redirecting said paper approaching said surface to contact a surface of the other guide plate through the tangential line of said roller.
A paper guide apparatus comprising:
- a printer for printing characters on a recording medium;
- a roller abutting against said printer at a tangential point of contact that defines a tangential line of the roller;
- a pair of opposed guide plates for initially guiding said recording medium along a first path substantially parallel to the tangential line of said roller;
- and
- a device for imparting stiffness to the recording medium including a projecting portion provided on a first surface of at least one of said pair of guide plates to forcibly redirect said recording medium approaching said first surface along a second path that is not parallel to the first path to contact a second surface provided on the other one of said pair of opposed guide plates.
Dependencies are inferred from the claim text.